In plain english: it took me 3 hours and 30 minutes to compress 5 characters, the result was 7 characters long. To arrive at the result 143 billion iterations was necessary. There are roughly 25 calculations per iteration.

Compressing 3 characters took around 0,2 seconds. Compressing 4 characters took around 94 minutes. If I were to attempt this on 6 characters it would take around 38 days to calculate. 7 characters would take 26,1 years to complete. time_of_one_iteration*(256^num_of_characters)